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Merge branches 'pm-cpufreq' and 'pm-cpuidle'

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* pm-cpufreq:
  cpufreq: intel_pstate: Add one more OOB control bit

* pm-cpuidle:
  cpuidle: Rearrange s2idle-specific idle state entry code
  PM: s2idle: Clear _TIF_POLLING_NRFLAG before suspend to idle
This commit is contained in:
Rafael J. Wysocki 2020-06-26 17:09:49 +02:00
commit 0e3fb2a128
3 changed files with 19 additions and 8 deletions
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7
drivers/cpufreq/intel_pstate.c
View File

@ -2677,6 +2677,8 @@ static struct acpi_platform_list plat_info[] __initdata = {
{ } /* End */
};
#define BITMASK_OOB (BIT(8) | BIT(18))
static bool __init intel_pstate_platform_pwr_mgmt_exists(void)
{
const struct x86_cpu_id *id;
@ -2686,8 +2688,9 @@ static bool __init intel_pstate_platform_pwr_mgmt_exists(void)
id = x86_match_cpu(intel_pstate_cpu_oob_ids);
if (id) {
rdmsrl(MSR_MISC_PWR_MGMT, misc_pwr);
if (misc_pwr & (1 << 8)) {
pr_debug("Bit 8 in the MISC_PWR_MGMT MSR set\n");
if (misc_pwr & BITMASK_OOB) {
pr_debug("Bit 8 or 18 in the MISC_PWR_MGMT MSR set\n");
pr_debug("P states are controlled in Out of Band mode by the firmware/hardware\n");
return true;
}
}

5
drivers/cpuidle/cpuidle.c
View File

@ -186,9 +186,10 @@ int cpuidle_enter_s2idle(struct cpuidle_driver *drv, struct cpuidle_device *dev)
* be frozen safely.
*/
index = find_deepest_state(drv, dev, U64_MAX, 0, true);
if (index > 0)
if (index > 0) {
enter_s2idle_proper(drv, dev, index);
local_irq_enable();
}
return index;
}
#endif /* CONFIG_SUSPEND */

15
kernel/sched/idle.c
View File

@ -96,6 +96,15 @@ void __cpuidle default_idle_call(void)
}
}
static int call_cpuidle_s2idle(struct cpuidle_driver *drv,
struct cpuidle_device *dev)
{
if (current_clr_polling_and_test())
return -EBUSY;
return cpuidle_enter_s2idle(drv, dev);
}
static int call_cpuidle(struct cpuidle_driver *drv, struct cpuidle_device *dev,
int next_state)
{
@ -171,11 +180,9 @@ static void cpuidle_idle_call(void)
if (idle_should_enter_s2idle()) {
rcu_idle_enter();
entered_state = cpuidle_enter_s2idle(drv, dev);
if (entered_state > 0) {
local_irq_enable();
entered_state = call_cpuidle_s2idle(drv, dev);
if (entered_state > 0)
goto exit_idle;
}
rcu_idle_exit();